MIL-DTL-38999 Series II connectors feature up to 128 contacts, offering robust environmental sealing and a wide operating temperature range from -65 °C to 200 °C. These connectors come in various configurations including front and rear wall mounts, jam nuts, and box mounts, with options for straight, RFI grounding, and standard plugs. Compliant with military specification MIL-DTL-38999 II, they utilize M39029 rear release crimp contacts and are constructed with aluminum shells. Plating options include cadmium-free finishes, and they are designed for rugged environments with a service rating of I and ingress protection. The connectors are ideal for applications requiring high reliability and durability in harsh conditions.